[BUG] litellm integration callback report error

[Tint0ri]

litellm 1.89.1, integrate with headroom callback by YAML. Got error:
LiteLLM Proxy:ERROR: common_request_processing.py:1837 - litellm.proxy.proxy_server._handle_llm_api_exception(): Exception occured - type object 'HeadroomCallback' has no attribute 'async_post_call_success_hook'
Traceback (most recent call last):
File "/app/.venv/lib/python3.13/site-packages/litellm/proxy/proxy_server.py", line 8504, in chat_completion
result = await base_llm_response_processor.base_process_llm_request(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<16 lines>...
)
^
File "/app/.venv/lib/python3.13/site-packages/litellm/proxy/common_request_processing.py", line 1407, in base_process_llm_request
response = await proxy_logging_obj.post_call_success_hook(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<3 lines>...
)
^
File "/app/.venv/lib/python3.13/site-packages/litellm/proxy/utils.py", line 2404, in post_call_success_hook
raise e
File "/app/.venv/lib/python3.13/site-packages/litellm/proxy/utils.py", line 2398, in post_call_success_hook
callback_response = await callback.async_post_call_success_hook(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'HeadroomCallback' has no attribute 'async_post_call_success_hook'

[Tint0ri]

litellm_settings:
callbacks: ["headroom.integrations.litellm_callback.HeadroomCallback"]

headroom-ai: 0.25, but 0.26 should be the same cause litellm_callback.py has no change